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IIT Indore's new eco-friendly cement-free concrete cuts costs by 20%, saves water

IIT Indore's new eco-friendly cement-free concrete cuts costs by 20%, saves water

India Today18-07-2025
IIT-Indore is shaking things up in the construction world. Its civil engineering team, led by Associate Professor Dr Abhishek Rajput, has created a cement-free concrete using geopolymer technology. The result? A stronger, faster, and greener way to build.This new concrete doesn't just perform better -- it could also bring down construction costs by up to 20% when local materials are used. Plus, it skips water curing altogether, which is a big win in times of water shortage.advertisementGOODBYE CEMENT, HELLO WASTE MATERIALSUnlike traditional concrete that relies on Ordinary Portland Cement (PCC), this new geopolymer high-strength concrete (G-HSC) uses fly ash and ground granulated blast furnace slag (GGBS) -- both industrial by-products. That means it's not just cement-free, it's waste-reducing too.
Even better, this concrete can cut CO emissions by up to 80%, addressing one of the construction sector's biggest climate problems. Cement alone is responsible for about 8% of global CO emissions, releasing around 2.5 billion tonnes of CO every year.PERFECT FOR URGENT PROJECTSWhat makes this concrete even more impressive is its speed. It gains over 80 MPa compressive strength in just three days, making it ideal for urgent builds like military bunkers, bridges, disaster relief structures, and railway or highway repairs.In contrast, regular cement-based concrete usually takes 28 days to reach similar strength levels.Prof. Suhas Joshi, Director of IIT Indore, called the project 'an excellent example' of how the institute is supporting India's green goals.Lead researcher Dr Rajput added, 'The goal is to find a practical solution that benefits both the environment and the construction industry.'- Ends
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